<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
  body {
    position: relative;
    align-items: center;
    min-height: 100vh;
    background-color: rgb(118, 218, 255);
    overflow: hidden;
}
body:before, body:after {
        content: "";
        position: absolute;
        left: 50%;
        min-width: 300vw;
        min-height: 300vw;
        background-color: #fff;
        animation-name: rotate;
        animation-iteration-count: infinite;
        animation-timing-function: linear;
    }

    body:before {
        bottom: 15vh;
        border-radius: 45%;
        animation-duration: 10s;
    }

    body:after {
        bottom: 12vh;
        opacity: .5;
        border-radius: 47%;
        animation-duration: 10s;
    }
@keyframes rotate {
    0% {
        transform: translate(-50%, 0) rotateZ(0deg);
    }
    50% {
        transform: translate(-50%, -2%) rotateZ(180deg);
    }
    100% {
        transform: translate(-50%, 0%) rotateZ(360deg);
    }
}

h2 {
    position: relative;
    color: #333;
    z-index: 10;
    text-align: center;
    height: 100vh;
    line-height: 140vh;
    font-size: 8vw;
    text-shadow: 3px 3px 2px #999;
}
</style>
<body>
  <h2>Pure Css Wave</h2>
</body>
</html>